{"action":"Upgrade litestar to 2.20.0 or later.","affected":[{"fixed":"2.20.0","introduced":"0"}],"component":"litestar","cve_ids":["CVE-2026-25479"],"ecosystem":"PyPI","epss":0.00358,"exploited":false,"fixed_versions":["2.20.0"],"ghsa_id":"GHSA-93ph-p7v4-hwh4","id":"tcs_01M5KGY0WMAERPVG7ZD9E6A9PG","modified_at":"2026-07-13T07:15:34.259035891Z","published_at":"2026-02-09T20:15:57.177Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2196","https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0","https://github.com/litestar-org/litestar/releases/tag/v2.20.0","https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace","https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-2196","url":"https://osv.dev/vulnerability/PYSEC-2026-2196"}],"summary":"Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows re"}